As heard on the Good Stuff with Jim Thompson 

This from an author friend:

 

Avoid alliteration. Always.

Prepositions are not words to end sentences with.

Avoid cliches like the plague.

It is wrong to ever split an infinitive.

Contractions aren't necessary.

Foreign words and phrases are not apropos.

Don't be redundant; don't use more words than necessary; it's highly superfluous. Exaggeration is a billion times worse than understatement.

Analogies in writing are like feathers on a snake.

Who needs rhetorical questions?

 

Any more questions?